摘要:
A continuous time sigma delta analog to digital converter may use a finite impulse response filter for delay compensation. In some embodiments, the filter may be simplified by using only the first and/or second filter coefficients.
摘要:
A technique includes receiving an analog signal and generating at least one second signal that has a timing indicative of a magnitude of the analog signal. The technique includes acquiring a plurality of measurements of the timing, where the measurements vary according to a stochastic distribution; and providing a digital representation of the analog signal based at least in part on the measurements.
摘要:
Methods and systems to provide dynamic element matching (DEM) in multi-phase sample systems include multiple uncorrelated, dual data weighted averaging, dynamic element matching (DDWA DEM). DDWA DEM may be implemented in a multiple-phase sample system in which sample paths and feedback paths share capacitances. Compensation feedback is apportioned amongst corresponding banks of capacitive sample circuits to utilize the capacitive sample circuits within each bank substantially equally over multiple sample cycles. The apportioning is substantially un-correlated between banks, which may reduce in-band quantization noise folding. DDWA DEM may be implemented within a digital-to-analog converter (DAC), in a delta-sigma modulator.
摘要:
A discrete time filter achieves gain by sampling a signal using capacitors arranged in a one configuration and then changing the capacitors to a series configuration to develop a filter output voltage. In at least one embodiment, a variable gain filter is achieved by varying the number of capacitors that are active in the filter.
摘要:
An apparatus for transmitter control is disclosed. The apparatus includes an analog circuit designed to operate on at least a portion of a communications signal to be wirelessly transmitted, based at least in part on a control signal. The apparatus includes a lookup table coupled to the analog circuit, with the lookup table designed to output the control signal based at least in part on the communications signal, or one or more measured metrics of the communications signal. Embodiments of the present invention include, but are not limited to, methods encompassing the operations described above, as well as subsystems and systems designed to operate in the above described manner.